JP2013038797A - Signaling of power information for mimo transmission in wireless communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide signaling of power information to facilitate reporting channel quality indicator (CQI).SOLUTION: A Node B may send power information that may be used by UE to determine a power per channelization code, P. The power information includes a power offset between the power of a data channel, P, and the power of a pilot channel. The Node B may determine Pon the basis of the power available for the data channel, the number of channelization codes, and a designated number of channelization codes. The UE may determine Pon the basis of the power information from the Node B and the designated number of channelization codes, estimate at least one SINR of at least one transport block on the basis of P, determine CQI information for the transport block on the basis of the SINR, and send the CQI information to the Node B.

Description

Priority claim

(Claiming priority under Article 35U.SC 119)
The present invention is expressly incorporated herein by reference, assigned to the assignee of the present application, and filed on January 12, 2007, entitled “Virtual Signaling of Virtual Power Offset in MIMO”. Claim 60 / 884,820 priority.

  The present disclosure relates generally to communication, and more specifically to techniques for power information signaling in a wireless communication system.

  In a wireless communication system, a Node B can utilize multiple (T) transmit antennas for data transmission to user equipment (UE) with multiple (R) receive antennas. Multiple transmit and receive antennas form a multiple input multiple output (MIMO) channel that can be used to increase throughput and / or improve reliability. For example, Node B may transmit up to T data streams simultaneously from T transmit antennas to improve throughput. Alternatively, the Node B may transmit a single data stream from all T transmit antennas in order to improve the reception quality by the UE. Each data stream can carry one transmission block of data within a given transmission time interval (TTI). Accordingly, the terms “data stream” and “transmission block” may be used interchangeably.

  Good performance (eg, high throughput) can be achieved by sending each transmission block at the highest possible rate that still allows the UE to reliably decode the transmission block. The UE can estimate the signal to interference and noise ratio (SINR) of each possible precoding combination of transmission blocks that can be transmitted, and then to the estimated SINR of the best precoding combination of transmission blocks Based on this, channel quality indicator (CQI) information can be determined. CQI information can convey a set of processing parameters for each transmission block. The UE can send CQI information to the Node B. Node B may process one or more transport blocks according to the CQI information and send the transport blocks to the UE.

  Data transmission performance may depend on accurate determination and reporting of CQI information by the UE. Accordingly, there is a need in the art for techniques to facilitate accurate determination and reporting of CQI information.

Techniques for power information signaling that facilitate accurate determination and reporting of CQI information for MIMO transmission are described herein. For MIMO transmissions transmitted using code division multiplexing, the SINR of a transmission block may depend on the power per channelization code, _POVSF , but may not be a linear function of _POVSF .

In an aspect, the Node B can then transmit power information that can be used by the UE to determine a P _OVSF that can be used for SINR estimation. In one design, the power information includes the power of the data channel, the power of the _PHSDSCH and pilot channel, and the power offset between the _CPICH . In general, a data channel may include any number of channelization codes. P _HSPDSCH may be given for a specified number M of channelization codes, which may be known values or given via signaling. Node B has power available for the data channel

Based on the number K of channelization codes available for the data channel and the specified number M of channelization codes, the _PHSDSCH can be determined. If the specified number of channelization codes is greater than the number of available channelization codes, P _HSPDSCH is

Can be larger.

The UE can receive power information from the Node B and can determine the P _OVSF based on the power information and a specified number of channelization codes. In one design, UE can obtain a power offset from the power information, it can be calculated _{P HSPDSCH} based on the power offset and the known _{P CPICH.} The UE can then distribute the P _HSPDSCH across at least one transport block and across a specified number of channelization codes to obtain the P _OVSF . The UE can estimate the SINR of each transmission block based on the P _OVSF, and can then determine CQI information for at least one transmission block based on the SINR of each transmission block. The UE can send CQI information to the Node B.

The Node B can receive CQI information from the UE and can transmit at least one transmission block in MIMO transmission to the UE. In one design, the Node B in the above P _OVSF, may transmit transport block with a channelization code for a specified number. In another design, the Node B may send a transmission block with K available channelization codes greater than or equal to P _OVSF , with a specified number of channelization codes M, and available channelization codes. The size of the transmission block can be scaled based on the number K. In yet another design, the Node B may scale P _OVSF based on K and M, and then send a transmission block with K available channelization codes with the adjusted P _OVSF. be able to.

  Various aspects and features of the disclosure are described in further detail below.

FIG. 1 shows a wireless communication system. FIG. 2 shows a block diagram of the Node B and the UE. FIG. 3 shows a timing diagram for a set of physical channels. FIG. 4 shows the power offset scaling by Node B. FIG. 5 shows a mechanism for transmitting a power offset by the Node B. FIG. 6 shows a process for determining CQI information by the UE. FIG. 7 shows the process performed by Node B. FIG. 8 shows a process performed by the UE.

  The techniques described herein include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal FDMA (OFDMA) systems, single carrier FDMA (SC -Can be used for various wireless communication systems such as FDMA) systems. The terms “system” and “network” can often be used interchangeably. A CDMA system may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, and so on. UTRA includes Wideband Code Division Multiple Access (W-CDMA) and other CDMA variants. cdma2000 covers IS-2000, IS-95 and IS-856 standards. UTRA is part of the Universal Mobile Telecommunications System (UMTS), both described in literature provided by an organization named “3rd Generation Partnership Project” (3GPP). cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2). These various radio technologies and standards are known in the art. For clarity, those techniques are described below for UMTS, and UMTS terminology is used in much of the description below.

  FIG. 1 shows a wireless communication system 100 with multiple Node Bs 110 and multiple UEs 120. System 100 may also be referred to as a Universal Terrestrial Radio Access Network (UTRAN) in UMTS. Node B is a fixed station that generally communicates with the UE and may also be referred to as an evolved Node B (eNode B), a base station, an access point, and so on. Each Node B 110 provides communication coverage for a particular geographic area and supports communication for UEs within the coverage area. System controller 130 is coupled to Node B 110 and provides coordination and control to these Node Bs. System controller 130 may be a single network entity or a collection of network entities.

  UE 120 may be distributed throughout the system, and each UE may be stationary or mobile. A UE may also be called a mobile station, a terminal, an access terminal, a subscriber unit, a station, etc. A UE may be a mobile phone, a personal digital assistant (PDA), a wireless device, a handheld device, a wireless modem, a laptop computer, and so on.

  FIG. 2 shows a block diagram of a design of one Node B 110 and one UE 120. In this design, Node B 110 includes multiple (T) antennas 220a through 220t, and UE 120 includes multiple (R) antennas 252a through 252r. The MIMO transmission may be transmitted from the T transmit antenna of Node B 110 to the R receive antenna of UE 120.

  At Node B 110, the transmit (TX) data and signaling processor 212 can receive data from a data source (not shown) for all scheduled UEs. A processor 212 can process (eg, format, encode, interleave, symbol map) the data for each UE and provide data symbols that are modulation symbols of the data. The processor 212 can further process signaling (eg, power information) and provide signaling symbols that are modulation symbols for signaling. A spatial mapper 214 can precode the data symbols for that UE based on the precoding matrix or vector for each UE and can provide output symbols for all UEs. A CDMA modulator (MOD) 216 may perform CDMA processing on the output symbols and signaling symbols and provide T output chip streams to T transmitters (TMTR) 218a through 218t. Each transmitter 218 can process its output chip stream (eg, convert to analog, filter, amplify, upconvert frequency) and provide a downlink signal. T downlink signals from T transmitters 218a through 218t may be transmitted via T antennas 220a through 220t, respectively.

  In UE 120, R antennas 252a through 252r can receive downlink signals from Node B 110 and can provide R received signals to R receivers (RCVR) 254a through 254r, respectively. Each receiver 254 can process the received signal (eg, filter, amplify, downconvert frequency, digitize), and sample the channel processor 268 and equalizer / CDMA demodulator (DEMOD) 260. Can be provided. The processor 268 may derive coefficients for the front end filter / equalizer and one or more combiner matrices for the equalizer / CDMA demodulator 260. Unit 260 can perform equalization with a front-end filter and CDMA demodulation, and can provide filtered symbols. MIMO detector 262 can combine the filtered symbols across the spatial dimension, and is a detected symbol that is an estimate of the data symbols and signaling symbols transmitted to UE 120 Can be provided. A receive (RX) data and signaling processor 264 can process (eg, symbol demap, deinterleave, decode) the detected symbols and provide decoded data and signaling. In general, the processing by equalizer / CDMA demodulator 260, MIMO detector 262, and RX data and signaling processor 264 is processed at Node B 110 by the CDMA modulator 216, spatial mapper 214, and TX data and signaling processor 212, respectively. Complementary.

  Channel processor 268 can estimate the response of the radio channel from Node B 110 to UE 120. Processors 268 and / or 270 can process the derived coefficients and / or channel estimates to obtain feedback information that can include precoding control indicator (PCI) information and CQI information. PCI information can carry the number of transmission blocks to transmit in parallel and a specific precoding matrix or vector used to pre-encode the transmission blocks. A transmission block may further be referred to as a packet, a data block, etc. The CQI information can carry processing parameters (eg, transmission block size and modulation scheme) for each transmission block. Processors 268 and / or 270 can evaluate different possible precoding matrices or vectors that can be used for data transmission and can select a precoding matrix or vector that can provide the best performance, eg, the highest overall throughput. Processors 268 and / or 270 can further determine CQI information for the selected precoding matrix or vector.

  Data and feedback information for transmission on the uplink is processed by TX data and signaling processor 280 and further processed by CDMA modulator 282 and may be transmitted via antennas 252a through 252r, respectively. May be coordinated by transmitters 254a through 254r. The number of transmit antennas at UE 120 may or may not be equal to the number of receive antennas. For example, UE 120 may receive data using two antennas, but may transmit feedback information using only one antenna. At Node B 110, the uplink signal from UE 120 is received by antennas 220a through 220t, conditioned by receivers 218a through 218t, processed by equalizer / CDMA demodulator 240, detected by MIMO detector 242, and received by UE 120. It may be processed by RX data and signaling processor 244 to recover the sent data and feedback information. The number of receiving antennas at Node B 110 may or may not match the number of transmitting antennas.

  Controllers / processors 230 and 270 may direct the operation at Node B 110 and UE 120, respectively. Memories 232 and 272 may store program codes and data for Node B 110 and UE 120, respectively. The scheduler 234 can schedule the UE for downlink and / or uplink transmission, eg, based on feedback information received from the UE.

  In UMTS, data for the UE may be processed as one or more transport channels in higher layers. A transport channel can carry data for one or more services such as voice, video, packet data, and so on. Transport channels may be mapped to physical channels at the physical layer. The physical channels can be channelized with different channelization codes and thus can be orthogonal to each other in the code domain. UMTS uses orthogonal variable spreading factor (OVSF) codes as channelization codes for physical channels.

  Release 5 and later 3GPP supports High Speed Downlink Packet Access (HSDPA), which is a set of procedures and channels that enable high speed packet data transmission on the downlink. For HSDPA, the Node B can transmit data on a high speed downlink shared channel (HS-DSCH), which is a downlink transport channel shared by all UEs in both time and code. The HS-DSCH can carry data for one or more UEs within each TTI. For UMTS, a 10 millisecond (ms) radio frame is divided into five 2 ms subframes, each subframe including three slots, each slot having a duration of 0.667 ms. The TTI is equivalent to one subframe for HSDPA and is the smallest time unit that a UE can be scheduled and served. HS-DSCH sharing can be dynamically changed from TTI to TTI.

Table 1 lists the downlink and uplink physical channels used for HSDPA and provides a short description of each physical channel.

  FIG. 3 shows a timing diagram for the physical channel used for HSDPA. For HSDPA, the Node B may serve one or more UEs in each TTI. Node B can send signaling for each scheduled UE on the HS-SCCH and can send data on the HS-PDSCH after two slots. The Node B can use a configurable number of 128-chip OVSF codes for the HS-SCCH and can use up to 15 16-chip OVSF codes for the HS-PDSCH. HSDPA may be considered as having a single HS-PDSCH with up to 15 16-chip OVSF codes and a single HS-SCCH with a configurable number of 128-chip OVSF codes. Equivalently, HSDPA can be considered as having up to 15 HS-PDSCHs and a configurable number of HS-SCCHs. Each HS-PDSCH has a single 16-chip OVSF code, and each HS-SCCH has a single 128-chip OVSF code. The following description uses a single HS-PDSCH and a single HS-SCCH terminology.

  Each UE that can receive data on the HS-PDSCH can process up to four 128-chip OVSF codes for the HS-SCCH in each TTI to determine whether signaling has been sent for that UE. . Each UE scheduled in a given TTI can process the HS-PDSCH to recover the data sent to that UE. Each scheduled UE can send an acknowledgment (ACK) on the HS-DPCCH if the transmission block is decoded correctly, and a negative acknowledgment (NACK) otherwise. Each UE can further transmit PCI and CQI information to the Node B on the HS-DPCCH.

  FIG. 3 further shows the timing offset between HS-SCCH, HS-PDSCH and HS-DPCCH at the UE. HS-PDSCH starts after 2 slots of HS-SCCH. The HS-DPCCH starts at approximately 7.5 slots from the end of the corresponding transmission on the HS-PDSCH.

  The UE may send CQI information to allow the Node B to properly process and send data to the UE. In general, CQI information may be sent for any number of transport blocks or data streams. For clarity, much of the description below assumes that one or two transmission blocks can be sent in a given TTI and that the CQI information may be for one or two transmission blocks.

  Node B can send two transport blocks using one of multiple possible precoding matrices, or one column of one of the possible precoding matrices. / Vector can be used to send a single transport block. The UE can evaluate data performance for different possible precoding matrices and vectors that can be used by the Node B for data transmission to the UE. For each precoding matrix or vector, the UE can estimate the quality of each transport block, which can be given by any suitable metric. For clarity, in the following description, it is assumed that the quality of each transport block is given by SINR corresponding to a channel of additional white Gaussian noise (AWGN), which is simply referred to as SINR in the following description. The UE can determine the data performance (eg, overall throughput) for each precoding matrix or vector based on the SINR (s) of all transport blocks. After evaluating every precoding matrix and vector, the UE can select the precoding matrix or vector that provides the best data performance.

  For each possible precoding matrix, the UE can estimate the SINR of two transmission blocks that can be transmitted in parallel with the precoding matrix. A transmission block with a higher SINR may be referred to as a primary transport block, and a transmission block with a lower SINR may be referred to as a secondary transport block. The SINR of each transport block is (i) the sum of the HS-PDSCH power, (ii) the number of OVSF codes used for the HS-PDSCH, (iii) channel gain and noise variance. (Iv) the type of receiver processing performed by the UE, (v) a transmission block when successive interference cancellation (SIC) is performed by the UE. May depend on various factors such as the order in which they are restored, and (vi) possibly other factors.

The SINR, SINR _i of transmission block i may be given as follows:

Where P _OVSF is the power per OVSF code for HS-PDSCH, X _i includes all other parameters that affect SINR, and F () is the SINR function applicable to the UE. is there.

The SINR function may depend on receiver processing at the UE and may not be a linear function of _POVSF .

Thus, if P _OVSF increases by G decibels (dB), the amount of improvement in SINR may not be known exactly based solely on the increase in P _OVSF G dB. This non-linear relationship between P _OVSF and SINR may be due to code-reuse interference, which is interference between two transmission blocks using the same OVSF code. Furthermore, the SINR function may not be known at Node B.

In one aspect, the Node B may transmit power information that may be used by the UE to determine the power per OVSF code, P _OVSF , for use in SINR estimation. The power information can be given in various forms and can be based on certain assumptions. In one design, the power information includes a power offset indicating the difference between the power of the HS-PDSCH, the power of the _PHSDSCH and the reference channel. The reference channel may be a Common Pilot Channel (CPICH) or some other channel with a known power. In one design, the HS-PDSCH power, P _HSPDSCH , may be determined as follows.

Where P _CPICH is the power of CPICH and Γ is the power offset that may be signaled by Node B.

Node B may signal a power offset Γ to the UE as described below. In Node B, P _HSPDSCH is the transmission power of HS-PDSCH, and P _CPICH is the transmission power of CPICH. At the UE, P _HSPDSCH is the received power of HS-PDSCH, and P _CPICH is the received power of CPICH. The UE may be able to determine the _PHSDSCH based on the carried power offset Γ, as shown in equation (2).

Node B and UE are available information so that the power per OVSF code used by Node B for data transmission meets or exceeds the P _OVSF used by UE for SINR estimation. P _OVSF can be calculated in the same way based on P _OVSF can be calculated in various ways. In one design, the P _HSPDSCH may be assigned uniformly to all transport blocks, and the P _OVSF may be the same for all transport blocks. In another _design, a particular percentage be assigned to a primary transport block of _{P HSPDSCH,} the remaining proportion of _{P HSPDSCH} can be assigned to the secondary transport block, _{and, P OVSF} may differ in two transport blocks.

In one design, P _OVSF may be calculated based on a specified number of OVSF codes, M. In one design, the Node B may provide M via higher layer signaling and / or some other mechanism, eg, periodically or whenever there is a change. In another design, M may be equal to the maximum number of OVSF codes for HS-PDSCH (ie, M = 15) or may be equal to some other predetermined / known value. In any case, P _OVSF may be obtained by allocating P _HSPDSCH uniformly across M OVSF codes as follows.

In equation (3), subtraction in dB is equivalent to division in linear units.

Table 2 lists some parameters used in the description herein and provides a short description for each parameter.

In general, P _HSPDSCH is

Can be smaller, larger, or larger. P _HSPDSCH and P _OVSF can be referred to as carried or calculated values, and

as well as

May be referred to as available values.

  Node B may have K OVSF codes available for HS-PDSCH. Here, K may or may not be equal to the specified number of OVSF codes. Node B can adjust the power offset Γ based on the number of available OVSF codes and the specified number of OVSF codes.

FIG. 4 illustrates power offset adjustment (scaling) by the Node B. Node B may have K available OVSF codes for HS-PDSCH, where 1 ≦ K <M for the example shown in FIG. Node B is also available for HS-PDSCH

Can have. Node B is uniformly across K available OVSF codes

By assigning

Can be calculated as follows.

Node B

P _OVSF equal to can be set. Node B can then calculate P _HSPDSCH such that P _OVSF is obtained for each of the M designated OVSF codes as follows:

Thereafter, the Node B, the power offset can be calculated as follows based on the _{P HSPDSCH} and known _{P CPICH} calculated.

If K is less than M, the calculated _PHSPDSCH is available at Node B as shown in FIG.

Can be bigger. If K is greater than M (not shown in FIG. 4), the calculated _PHSPDSCH is available

Can be smaller. In either case,

_May or may not be equal to P _HSPDSCH , the power offset Γ is based on a specified number of OVSF codes, the virtual or hypothetical used to calculate P _OVSF ) May be considered a power offset.

Node B may send power information used to determine _{POVSF in} various ways. In one design, the Node B may transmit power information via higher layer signaling and / or some other mechanism, for example, periodically or whenever there is a change.

  FIG. 5 shows a mechanism for transmitting a power offset Γ using radio resource control (RRC) messages in UMTS. The Node B may send a Physical Channel Reconfiguration message to the UE to allocate, exchange or release the set of physical channels used by the UE. This message can include a number of information elements (IEs), one of which can be a downlink HS-PDSCH information IE that can carry information for the HS-PDSCH. The downlink HS-PDSCH information IE may include Measurement Feedback Info IE that can convey information affecting the feedback information sent by the UE on the uplink to the Node B. The measurement feedback information IE can include a measurement power offset parameter that can be set to the power offset Γ calculated as shown in equation (6). The power offset Γ may further be transmitted in other RRC messages to the UE. RRC messages and IEs are described in 3GPP TS 25.331 entitled “Radio Resource Control (RRC)” dated September 2007, which is publicly available.

Node B can also send the power offset Γ in other ways. Node B may also send other types of information to allow the UE to calculate P _OVSF . In general, the Node B may send a relative value (eg, power offset) or an absolute value (eg, P _HSPDSCH ) for the calculation of P _OVSF . Node B can transmit power information when the link for the UE is set up, changed, etc.

The UE can receive power information (eg, power offset) from the Node B and can calculate P _OVSF based on the power information and other known information. The UE can then use _POVSF to determine CQI information.

FIG. 6 shows a process 600 for determining CQI information for multiple (eg, two) transport blocks. For example, as shown in Equation (2), the UE can calculate the HS-PDSCH reception power and P _HSPDSCH based on the power offset Γ received from the Node B, and the CPICH power and P _CPICH (block 610). ). The UE may then calculate P _OVSF based on the specified number of P _HSPDSCH and OVSF codes, eg, as shown in equation (3) (block 612). The UE may estimate the SINR of each transport block based on the P _OVSF and other parameters according to the SINR function (block 614).

  The UE may map the SINR of each transport block to the CQI index based on the CQI mapping table (block 616). The CQI mapping table can have L entries for L possible CQI levels, where L can be any suitable value. Each CQI level may relate to a set of parameters for the transport block, as well as the required SINR. The set of parameters may include a transmission block size, a modulation scheme, a code rate, and so on. The L CQI levels may be related to increasing the required SINR. For each transport block, the UE may select the highest CQI level with the requested SINR that is lower than the estimated SINR of that transport block. The CQI index for each transport block may indicate one of L possible CQI levels. The UE may send CQI indexes (indices) to Node B (block 618). Node B may send a transmission block to the UE based on the CQI index received from the UE.

  In one design, symmetric OVSF code assignment is used, and the same number and the same set of OVSF codes are used for the two transport blocks. In this design, the CQI mapping table may be defined such that the same number of OVSF codes are used for all CQI levels. In another design, asymmetric OVSF code assignment is allowed, and the number of OVSF codes for the secondary transport block may be different (eg, less) from the number of OVSF codes for the primary transport block. In this design, the CQI mapping table may have different numbers of OVSF codes for different CQI levels, eg, fewer OVSF codes for one or more of the lowest CQI levels. The secondary transport block may be sent in a subset of the OVSF code used for the primary transport block.

  If a precoding matrix is selected, the UE can separately determine two CQI indices for the two transport blocks transmitted in parallel with the selected precoding matrix. When the precoding vector is selected, the UE can determine one CQI index for one transmission block transmitted with the selected precoding vector. The UE can send a single CQI value that can carry either one CQI index for one transport block or two CQI indexes for two transport blocks. In the case of two transport blocks, a total of 15 × 15 = 225 CQI index combinations occur in the two transport blocks, with a granularity of 15 CQI levels for each CQI index. Obtainable. If 8 bits are used for a single CQI value, levels up to 256-225 = 31 may be used for the CQI index for one transport block.

In one design, a single CQI value may be determined as follows.

Here, CQI _S is {0. . . 30}, CQI ₁ is {0. . . 14}, and CQI ₂ is {0. . . 14}, and the CQI is an 8-bit CQI value for one or two transport blocks.

  In the design shown in equation (7), CQI values in the range of 0 to 30 are used to carry the CQI index for one transport block, and CQI values in the range of 31 to 255 are two. Used to carry two CQI indices for one transport block. The UE can also map the CQI index or indices for one or two transport blocks to a single CQI value in other ways.

  In one design, the UE may send a PCI / CQI report that may include 2 bits for PCI information and 8 bits for CQI information. The PCI information can carry a precoding matrix or vector selected by the UE. The CQI information can include one 8-bit CQI value calculated as shown in Equation (7). The 10 bits for PCI / CQI reporting can be channel coded with a (20, 10) block code to obtain a codeword of 20 code bits. The 20 code bits for the PCI / CQI report may be spread and transmitted on the HS-DPCCH in the second and third slots of the TTI, labeled “CQI” in FIG.

  The Node B can receive a PCI / CQI report from the UE, and based on the reported CQI value, the UE prefers one or two transport blocks and the preferred transport block A CQI index for each can be determined. Node B may send the number of transmission blocks chosen by the UE or a smaller number of transmission blocks. For example, if the UE chooses two transport blocks, the Node B can send 0, 1 or 2 transport blocks to the UE.

The UE may determine a CQI index for each transport block based on P _OVSF , which may be obtained based on a specified number of OVSF codes, M. Node B may have K OVSF codes available for HS-PDSCH, where K may or may not be equal to M. Node B is available in K, M, P _OVSF , and Node B

The data can be transmitted to the UE in various ways depending on the UE.

If K = M, the Node B can send each transport block with K available OVSF codes that is greater than or equal to P _{OVSF to} the UE.

For K <M, in one design, the Node B can reduce the transmission block size by K / M times, and the UE has a smaller size transmission block with K OVSF codes greater than or equal to P _OVSF. Can be sent. For example, if K = 10, M = 15, and a transmission block size of S is selected by the UE, the Node B has 10 OVSF codes with P _OVSF in the UE and a size of 10 · S / 15. A transmission block can be transmitted. This design can ensure that the SINR of the transmitted transport block exactly matches the SINR estimated by the UE, since the same P _OVSF is used for both the SINR estimation by the UE and the data transmission by the Node B. In another design, Node B _may expand the _{P OVSF} to M / K times and, UE by a higher _{P OVSF (at the higher P OVSF} ), it can send the size S more transmission blocks. Node B can expect improvements in SINR with higher P _OVSF and can select the transport block size accordingly.

For K> M, in one design, Node B can expand the transmission block size by a factor of K / M, and the UE is equipped with K available OVSF codes greater than or equal to P _OVSF , K · S / M Larger size transmission blocks can be sent. In another design, the Node B can reduce P _OVSF by M / K times and then send a transport block of size S or less with a lower P _OVSF by the UE.

In general, Node _B, as above _{P OVSF} is used for each OVSF code, K, M,

_And the number of OVSF codes to use for HS-PDSCH can be selected based on P _HSPDSCH . Node B can send each transport block with up to K OVSF codes that are greater than or _{equal to} P _OVSF . Node B may adjust the transport block size based on the number of OVSF codes used for HS-PDSCH and the specified number of OVSF codes used to determine CQI.

FIG. 7 shows a design of a process 700 performed by a Node B (or transmitter). With the equal power per channelization code, P _OVSF , power information indicating the total power, P _HSPDSCH , may be determined for a specified number of channelization codes (block 712). In one design, the power information may include a power offset between the sum of the power for the number of channelization codes specified for the data channel and the power of the pilot channel, P _CPICH . The specified number of channelization codes may be the maximum number of channelization codes available for data transmission, which is 15 for HS-PDSCH. The specified number of channelization codes may be a constant channelization code that is also known a priori by the UE.

In one design of block 712, the power available for the data channel,

, And the number of channelization codes available for the data channel, K, may be determined. Power per channelization code,

Is the power available,

Based on the number of available channelization codes. Thereafter, the total power of the data channel, P _HSPDSCH is, for example, a specified number of channelization codes, and the power per channelization code, as shown in equation (5):

Can be calculated based on The power offset can then be determined based on the sum of the data channel power, P _HSPDSCH , and the power of the pilot channel, P _CPICH , for example, as shown in equation (6). The total power P _HSPDSCH determined based on the power information is the available power

It can be larger or smaller. The power information may be sent to the UE, for example, in an RRC message or via some other means (block 714).

At least one CQI index for at least one transport block, the channelization code for each of the _power, based on _{P OVSF,} is determined by the UE, together with at least one CQI index may be received from the UE (block 716). At least one transport block may be sent to the UE based on the at least one received CQI index (block 718). In one design, the transport block may be sent to the UE with a specified number of channelization codes at power per channelization code, P _OVSF or higher. In another design, the transmission block may be adjusted based on a specified number of channelization codes and the number of available channelization codes. Thereafter, the transmission block may be sent to the UE at the power per channelization code, _POVSF , with the number of available channelization codes. In yet another design, the power per channelization code may be adjusted based on a specified number of channelization codes and the number of available channelization codes. The transmission block may then be transmitted to the UE with the number of available channelization codes with adjusted power for each channelization code.

FIG. 8 shows a design of a process 800 performed by the UE (or receiver). The power information may be received from the Node B, eg, in an RRC message or via some other means (block 812). A power per channelization code, _POVSF , may be determined for a specified number of channelization codes based on the power information (block 814). In one design of block 814, the power offset may be obtained from the power information and the received power of the data channel, P _HSPDSCH , for example, the power offset and the received power of the pilot channel, P It can be determined based on _CPICH . Thereafter, the power per channelization code, P _OVSF , may be determined based on the specified number of data channel received power, P _HSPDSCH and channelization codes, eg, as shown in equation (3).

  At least one CQI index for at least one transport block may be determined based on the power per channelization code (block 816). In one design of block 816, at least one SINR of at least one transmission block may be estimated based on the power per channelization code. Thereafter, at least one CQI index for the at least one transport block may be determined based on the at least one SINR and transmitted to the Node B (block 818).

At least one transport block may be received from Node B along with a transport block (transport block (s)) transmitted at or above the power per channelization code, P _OVSF , by Node B (block 820). The transmission block may be received via a number of available channelization codes and may have an adjusted size based on a specified number of channelization codes and the number of available channelization codes.

  For clarity, the technology has been described for data transmission using OVSF codes. The technique can also be used for other types of resources. In general, the Node B can determine power information indicating the total power for a specified number of resource elements with equal power for each resource element. The specified number of resource elements includes the specified number of subcarriers, the specified number of channelization codes, the specified number of timeslots, the specified number of data streams, the specified number of data streams It can correspond to a transmission block, a specified number of channels, a specified number of antennas, etc. Node B may transmit power information to the UE, and may transmit data comprising one or more resource elements to the UE at or above the power for each resource element.

  Those skilled in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical fields or It can be represented by optical particles, or any combination thereof.

  Those skilled in the art will understand that the various illustrative logic blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or a combination of both. You will understand further. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. A skilled artisan can implement the described functionality in various ways for each particular application, but such implementation decisions are interpreted as causing deviations from the scope of this disclosure. Should not.

  Various illustrative logic blocks, modules, and circuits described in connection with the disclosure herein include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays ( FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein may be implemented or performed . A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor is also implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors associated with a DSP core, or any other such configuration. obtain.

  The method or algorithm steps described in connection with the disclosure herein may be implemented directly in hardware, in software modules executed by a processor, or in a combination of the two. A software module resides in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. Can be (reside). An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may be present in the user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.

  In one or more exemplary designs, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, such computer-readable media may be RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device, or general purpose or special purpose Any other medium that can be used to transmit or store the desired program code means in the form of instructions or data structures that can be accessed by a computer or general purpose or special purpose processor. Can be included. In addition, every connection is properly named a computer-readable medium. For example, the software may use a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology such as infrared, wireless, and microwave to use a website, server, or other remote source ( When transmitted from a remote source), coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the definition of the medium. Disks and discs used here are usually compact disks (CDs) that are disks that magnetically reproduce data and disks that optically reproduce data with a laser. , Laser discs, optical discs, digital versatile discs (DVD), floppy discs, and Blu-ray discs. Combinations of the above should also be included within the scope of computer-readable media.

  The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the present disclosure. Accordingly, this disclosure is not intended to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the present disclosure. Accordingly, this disclosure is not intended to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The invention described in the scope of claims at the time of filing the present application will be appended.
[1] configured to determine power information indicating a sum of powers of a specified number of channelization codes with equal power for each channelization code, and to transmit the power information to a user equipment (UE) At least one processor;
An apparatus for wireless communication comprising a memory connected to the at least one processor.
[2] The apparatus according to [1], wherein the power information includes a power offset between a power of the designated number of channelization codes for a data channel and a power of a pilot channel.
[3] The specified number of channelization codes is greater than the number of available channelization codes, and the sum of the powers of the specified number of channelization codes is greater than the available power for the data channel. Large apparatus according to [1].
[4] The at least one processor determines power available for the data channel, determines the number of channelization codes available for the data channel, the available power, the available channelization code. The apparatus according to [1], wherein the apparatus is configured to determine the power information based on a number of and the specified number of channelization codes.
[5] The at least one processor determines a power for each channelization code based on the available power and the number of available channelization codes, and the specified number of channelization codes. Calculating the sum of the power of the specified number of channelization codes based on the number of available channelization codes and the power per channelization code; The apparatus of [4], configured to determine the power information based on a total power.
[6] The at least one processor is configured to determine a power offset based on a sum of power of the designated number of channelization codes and a power of a pilot channel, and the power information is the power offset. [5] The device according to [5].
[7] The at least one processor receives at least one channel quality indicator (CQI) index for the at least one transport block from the UE, and the at least one CQI index is a power per channelization code. The apparatus of [1], wherein the apparatus is configured to transmit the at least one transport block to the UE based on the at least one CQI index determined by the UE based on
[8] The at least one processor is configured to transmit the at least one transmission block comprising the specified number of channelization codes to the UE at a power greater than or equal to the power of each channelization code [ 7] The apparatus according to the above.
[9] The at least one processor adjusts the size of the at least one transport block based on the designated number of channelization codes and the number of available channelization codes, and sends the channel to the UE. [7] The apparatus of [7], wherein the apparatus is configured to transmit the at least one transmission block comprising the number of available channelization codes at or above the power per activation code.
[10] The at least one processor adjusts a power for each channelization code based on the specified number of channelization codes and the number of available channelization codes, and sends the channel to the UE. [7] The apparatus of [7], wherein the apparatus is configured to transmit the at least one transmission block comprising the number of available channelization codes with adjusted power for each activation code.
[11] The apparatus of [1], wherein the at least one processor is configured to transmit each of a plurality of transmission blocks comprising a common set of channelization codes.
[12] The at least one processor transmits a first transmission block comprising a set of channelization codes and a second transmission block comprising a subset of the set of channelization codes used for the first transmission block [1] The apparatus according to [1], which is configured to transmit.
[13] The apparatus of [1], wherein the specified number of channelization codes is a maximum number of channelization codes that can be used for data transmission.
[14] The apparatus according to [1], wherein the specified number of channelization codes are a definite number of channelization codes that can be used for data transmission and are known a priori by the UE.
[15] The apparatus of [1], wherein the at least one processor is configured to transmit the power information in an information element in a radio resource control (RRC) message to the UE.
[16] determining power information indicating a sum of powers of a specified number of channelization codes with equal power for each channelization code;
Sending the power information to a user equipment (UE).
[17] Determining the power information comprises determining a power offset based on a sum of powers of the designated number of channelization codes for a data channel, the power information comprising the power information The method according to [16], including an offset.
[18] Determining the power information is based on power available for the data channel, number of channelization codes available for the data channel, a specified number of channelization codes, and power of the pilot channel, Determining a power offset, wherein the power information includes the power offset.
[19] At least one channel quality indicator (CQI) index determined by the UE based on the power per channelization code, the at least one CQI for at least one transport block from the UE. Receiving an index,
Processing the at least one transport block based on the at least one CQI index;
[16] The method of [16], further comprising: transmitting to the UE the at least one transmission block comprising the specified number of channelization codes at or above the power per channelization code.
[20] At least one channel quality indicator (CQI) index determined by the UE based on the power per channelization code, the at least one CQI for at least one transport block from the UE. Receiving an index,
Adjusting the size of the at least one transport block based on the specified number of channelization codes and the number of available channelization codes;
Processing the at least one transport block based on the at least one CQI index;
[16] The method of [16], further comprising: transmitting to the UE the at least one transmission block comprising the number of available channelization codes at or above the power per channelization code.
[21] means for determining power information indicative of a sum of powers of a specified number of channelization codes of equal power per channelization code;
An apparatus for wireless communication comprising means for transmitting the power information to a user equipment (UE).
[22] The means for determining the power information includes:
Means for determining a power offset based on a sum of power of the designated number of channelization codes for a data channel and a power of a pilot channel, wherein the power information includes the power offset [ 21] The apparatus of description.
[23] The means for determining the power information includes:
Means for determining a power offset based on the power available for the data channel, the number of channelization codes available for the data channel, the specified number of channelization codes, and the power of the pilot channel. The device according to [21], wherein the power information includes the power offset.
[24] At least one channel quality indicator (CQI) index determined by the UE based on the power per channelization code, the at least one CQI for at least one transport block from the UE. Means for receiving the index;
Means for processing the at least one transport block based on the at least one CQI index;
[21] The apparatus of [21], further comprising means for transmitting to the UE the at least one transmission block comprising the specified number of channelization codes at or above the power per channelization code.
[25] At least one channel quality indicator (CQI) index determined by the UE based on the power per channelization code, the at least one CQI for at least one transport block from the UE. Means for receiving the index;
Means for adjusting a size of the at least one transport block based on the specified number of channelization codes and the number of available channelization codes;
Means for processing the at least one transport block based on the at least one CQI index;
[21] The apparatus of [21], further comprising means for transmitting to the UE the at least one transport block comprising the number of available channelization codes greater than or equal to the power per channelization code.
[26] a code for causing at least one computer to determine power information indicative of a sum of powers of a specified number of channelization codes of equal power for each channelization code;
A code for causing the at least one computer to transmit the power information to a user equipment (UE);
A computer program product comprising a computer readable medium comprising:
[27] Determine a power offset indicating the total power for a set of 15 OVSF codes, with the same power for each orthogonal variable spreading factor (OVSF) code, regardless of the number of available OVSF codes, and user equipment ( At least one processor configured to transmit to the UE) the power offset in a Radio Resource Control (RRC) message;
An apparatus for wireless communication comprising a memory connected to the at least one processor.
[28] The at least one processor is at least one channel quality indicator (CQI) index determined by the UE based on the power per OVSF code, for at least one transport block from the UE. Receiving the at least one CQI index, processing the at least one transmission block based on the at least one CQI index, and providing the UE with 15 OVSF codes at or above the power of each OVSF code The apparatus according to [27], configured to transmit the at least one transmission block.
[29] The at least one processor is at least one channel quality indicator (CQI) index determined by the UE based on the power per OVSF code, for at least one transport block from the UE. Receiving the at least one CQI index, and adjusting the size of the at least one transmission block based on the 15 OVSF codes indicating the power of each OVSF code and the number of available OVSF codes, Process the at least one transmission block based on the at least one CQI index, and transmit the at least one transmission block having the number of available OVSF codes to the UE at a power equal to or higher than the power of each OVSF code. [27] description configured to Apparatus.
[30] At least one configured to determine power information indicating a sum of powers of a specified number of resource elements with equal power for each resource element, and to transmit the power information to a user equipment (UE) A processor;
An apparatus for wireless communication comprising a memory connected to the at least one processor.
[31] The specified number of resource elements includes a specified number of subcarriers, a specified number of channelization codes, a specified number of time slots, a specified number of data streams, and a specified number [30] The apparatus of [30], comprising a transmission block, a specified number of channels, or a specified number of antennas.
[32] The apparatus of [30], wherein the at least one processor is configured to transmit data including one or more resource elements to the UE at a power equal to or higher than the power of each resource element.
[33] receiving power information from the Node B, determining power per channelization code of a specified number of channelization codes based on the power information, and at least based on power per channelization code At least one processor configured to determine at least one channel quality indicator (CQI) index for one transport block and to transmit the at least one CQI index to a Node B;
An apparatus for wireless communication comprising a memory connected to the at least one processor.
[34] The at least one processor obtains a power offset from the power information, determines a reception power of a data channel and a reception power of a pilot channel based on the power offset, and receives the reception power of the data channel and the [33] The apparatus of [33], wherein the apparatus is configured to determine a power for each channelization code based on a specified number of channelization codes.
[35] The at least one processor estimates at least one signal-to-interference and noise ratio (SINR) of the at least one transmission block based on the power for each channelization code, and determines the at least one SINR. The apparatus of [33], configured to determine the at least one CQI index for the at least one transport block based on.
[36] The apparatus of [33], wherein the at least one processor is configured to receive the at least one transmission block transmitted by a Node B at or above the power per channelization code.
[37] The at least one processor is:
The at least one transport block having a size adjusted based on the specified number of channelization codes and the number of available channelization codes, wherein the available channelization codes from the Node B The apparatus of [33], configured to receive the at least one transmission block via a number.
[38] receiving power information from the Node B;
Determining a power for each channelization code of a specified number of channelization codes based on the power information;
Determining at least one channel quality indicator (CQI) index for at least one transport block based on power per channelization code;
Transmitting at least one CQI index to the Node B.
[39] Determining the power for each channelization code includes obtaining a power offset from the power information, determining a received power of a data channel based on the power offset and a received power of a pilot channel, and [38] The method of [38], comprising determining a power for each channelization code based on the received power of the data channel and the specified number of channelization codes.
[40] Determining the at least one CQI index includes estimating at least one signal-to-interference and noise ratio (SINR) of the at least one transmission block based on power for each channelization code; And determining the at least one CQI index for the at least one transport block based on the at least one SINR [38].
[41] The method of [38], further comprising receiving, by the Node B, the at least one transmission block transmitted at a power for each channelization code.
[42] means for receiving power information from the Node B;
Means for determining power per channelization code for a specified number of channelization codes based on the power information;
Means for determining at least one channel quality indicator (CQI) index for at least one transport block based on the power per said channelization code;
Means for transmitting said at least one CQI index to said Node B.
[43] The means for determining the power for each channelization code includes means for obtaining a power offset from the power information, and based on the power offset and the received power of the pilot channel, the received power of the data channel [43] The apparatus of [43], comprising means for determining and means for determining a power for each channelization code based on the received power of the data channel and the specified number of channelization codes.
[44] The means for determining the plurality of CQI indexes is for estimating at least one signal-to-interference and noise ratio (SINR) of the at least one transmission block based on power for each channelization code. [42] The apparatus of [42], comprising: means; and means for determining the at least one CQI index for the at least one transport block based on the at least one SINR.
[45] The apparatus according to [42], further comprising means for receiving the at least one transmission block transmitted by the Node B at a power equal to or higher than each channelization code.

Claims (45)

At least one configured to determine power information indicative of a sum of powers of a specified number of channelization codes with equal power per channelization code and to transmit the power information to a user equipment (UE) A processor;
An apparatus for wireless communication comprising a memory connected to the at least one processor.   The apparatus of claim 1, wherein the power information includes a power offset between a sum of power of the specified number of channelization codes for a data channel and power of a pilot channel.   The specified number of channelization codes is greater than the number of available channelization codes, and the sum of the powers of the specified number of channelization codes is greater than the available power for a data channel. The apparatus according to 1.   The at least one processor determines power available for a data channel, determines the number of channelization codes available for the data channel, the available power, the number of available channelization codes; 2. The apparatus of claim 1, wherein the apparatus is configured to determine the power information based on the specified number of channelization codes.   The at least one processor determines a power for each channelization code based on the available power and the number of available channelization codes, and the specified number of channelization codes, the usage Based on the number of possible channelization codes and the power for each channelization code, the power of the specified number of channelization codes is calculated, and the power of the specified number of channelization codes is summed The apparatus of claim 4, wherein the apparatus is configured to determine the power information based on:   The at least one processor is configured to determine a power offset based on a sum of power of the designated number of channelization codes and a power of a pilot channel, and the power information includes the power offset. Item 6. The device according to Item 5.   The at least one processor receives at least one channel quality indicator (CQI) index for at least one transport block from the UE, and the at least one CQI index is based on a power per channelization code. 2. The apparatus of claim 1, configured to transmit the at least one transport block to the UE based on the at least one CQI index determined by the UE.   8. The at least one processor is configured to transmit the at least one transport block comprising the specified number of channelization codes to the UE at a power greater than or equal to the power per channelization code. Equipment.   The at least one processor adjusts the size of the at least one transport block based on the specified number of channelization codes and the number of available channelization codes, and sends the UE to each channelization code. 8. The apparatus of claim 7, wherein the apparatus is configured to transmit the at least one transmission block comprising the number of available channelization codes at or above a power of.   The at least one processor adjusts power for each channelization code based on the specified number of channelization codes and the number of available channelization codes, and directs the UE to each channelization code. 8. The apparatus of claim 7, wherein the apparatus is configured to transmit the at least one transmission block comprising the number of available channelization codes at the adjusted power.   The apparatus of claim 1, wherein the at least one processor is configured to transmit each of a plurality of transmission blocks comprising a common set of channelization codes.   The at least one processor transmits a first transmission block comprising a set of channelization codes and a second transmission block comprising a subset of the set of channelization codes used for the first transmission block. The apparatus of claim 1 configured as follows.   The apparatus of claim 1, wherein the specified number of channelization codes is a maximum number of channelization codes available for data transmission.   2. The apparatus of claim 1, wherein the specified number of channelization codes is a constant channelization code that is a priori known by the UE that is available for data transmission.   The apparatus of claim 1, wherein the at least one processor is configured to transmit the power information in an information element in a radio resource control (RRC) message to the UE. Determining power information indicating the total power of a specified number of channelization codes, with equal power per channelization code;
Sending the power information to a user equipment (UE).   Determining the power information comprises determining a power offset based on a sum of powers of the specified number of channelization codes for a data channel, the power information including the power offset. The method of claim 16.   Determining the power information may include power offset based on power available for the data channel, number of channelization codes available for the data channel, a specified number of channelization codes, and pilot channel power. 17. The method of claim 16, comprising determining, wherein the power information includes the power offset. Receiving at least one channel quality indicator (CQI) index determined by the UE based on the power per channelization code, the at least one CQI index for at least one transport block from the UE; And
Processing the at least one transport block based on the at least one CQI index;
17. The method of claim 16, further comprising transmitting to the UE the at least one transmission block comprising the specified number of channelization codes at or above the power per channelization code. Receiving at least one channel quality indicator (CQI) index determined by the UE based on the power per channelization code, the at least one CQI index for at least one transport block from the UE; And
Adjusting the size of the at least one transport block based on the specified number of channelization codes and the number of available channelization codes;
Processing the at least one transport block based on the at least one CQI index;
The method of claim 16, further comprising: transmitting to the UE the at least one transport block comprising the number of available channelization codes at or above the power per channelization code. Means for determining power information indicative of a sum of powers of a specified number of channelization codes of equal power per channelization code;
An apparatus for wireless communication comprising means for transmitting the power information to a user equipment (UE). The means for determining the power information is:
Means for determining a power offset based on a sum of power of the specified number of channelization codes for a data channel and a power of a pilot channel, wherein the power information includes the power offset. Item 21. The apparatus according to Item 21. The means for determining the power information is:
Means for determining a power offset based on the power available for the data channel, the number of channelization codes available for the data channel, the specified number of channelization codes, and the power of the pilot channel. The apparatus of claim 21, wherein the power information includes the power offset. Receiving at least one channel quality indicator (CQI) index determined by the UE based on the power per channelization code, the at least one CQI index for at least one transport block from the UE; Means for
Means for processing the at least one transport block based on the at least one CQI index;
The apparatus of claim 21, further comprising means for transmitting to the UE the at least one transport block comprising the specified number of channelization codes greater than or equal to the power per channelization code. Receiving at least one channel quality indicator (CQI) index determined by the UE based on the power per channelization code, the at least one CQI index for at least one transport block from the UE; Means for
Means for adjusting a size of the at least one transport block based on the specified number of channelization codes and the number of available channelization codes;
Means for processing the at least one transport block based on the at least one CQI index;
The apparatus of claim 21, further comprising means for transmitting to the UE the at least one transport block comprising the number of available channelization codes at or above the power per channelization code. Code for causing at least one computer to determine power information indicative of a sum of powers of a specified number of channelization codes of equal power per channelization code;
A code for causing the at least one computer to transmit the power information to a user equipment (UE);
A computer program product comprising a computer readable medium comprising: Determines a power offset indicating the total power for a set of 15 OVSF codes, with the same power for each orthogonal variable spreading factor (OVSF) code, regardless of the number of available OVSF codes, to the user equipment (UE) At least one processor configured to transmit the power offset in a radio resource control (RRC) message;
An apparatus for wireless communication comprising a memory connected to the at least one processor.   The at least one processor is at least one channel quality indicator (CQI) index determined by the UE based on the power per OVSF code, the at least one transmission block for the at least one transport block from the UE. Receiving at least one CQI index, processing the at least one transmission block based on the at least one CQI index, and providing the UE with more than 15 powers per OVSF code and having at least one OVSF code. 28. The apparatus of claim 27, configured to transmit one transmission block.   The at least one processor is at least one channel quality indicator (CQI) index determined by the UE based on the power per OVSF code, the at least one transmission block for the at least one transport block from the UE. One CQI index is received, and the size of the at least one transmission block is adjusted based on the 15 OVSF codes indicating the power of each OVSF code and the number of available OVSF codes, and the at least one transmission block is adjusted. Based on one CQI index, the at least one transmission block is processed, and the UE transmits the at least one transmission block having the number of available OVSF codes at a power equal to or higher than the power per OVSF code. 28. The apparatus of claim 27 configured. At least one processor configured to determine power information indicating a sum of powers of a specified number of resource elements with equal power per resource element and to transmit the power information to a user equipment (UE);
An apparatus for wireless communication comprising a memory connected to the at least one processor.   The specified number of resource elements includes a specified number of subcarriers, a specified number of channelization codes, a specified number of time slots, a specified number of data streams, and a specified number of transmission blocks. 31. The apparatus of claim 30, comprising a specified number of channels or a specified number of antennas.   31. The apparatus of claim 30, wherein the at least one processor is configured to transmit data comprising one or more resource elements to the UE at a power greater than or equal to the power per resource element. Receiving power information from the Node B, determining power for each channelization code of a specified number of channelization codes based on the power information, and at least one transmission based on the power for each channelization code At least one processor configured to determine at least one channel quality indicator (CQI) index for the block and send the at least one CQI index to a Node B;
An apparatus for wireless communication comprising a memory connected to the at least one processor.   The at least one processor obtains a power offset from the power information, determines a reception power of a data channel and a reception power of a pilot channel based on the power offset, and determines the reception power of the data channel and the designated 34. The apparatus of claim 33, configured to determine a power for each channelization code based on a number of channelization codes.   The at least one processor estimates at least one signal-to-interference and noise ratio (SINR) of the at least one transmission block based on the power per channelization code, and based on the at least one SINR, 34. The apparatus of claim 33, configured to determine the at least one CQI index for the at least one transport block.   34. The apparatus of claim 33, wherein the at least one processor is configured to receive the at least one transmission block transmitted by a Node B at or above the power per channelization code. The at least one processor comprises:
The at least one transport block having a size adjusted based on the specified number of channelization codes and the number of available channelization codes, wherein the available channelization codes from the Node B 34. The apparatus of claim 33, configured to receive the at least one transmission block via a number. Receiving power information from Node B;
Determining a power for each channelization code of a specified number of channelization codes based on the power information;
Determining at least one channel quality indicator (CQI) index for at least one transport block based on power per channelization code;
Transmitting at least one CQI index to the Node B.   Determining the power for each channelization code includes obtaining a power offset from the power information, determining a received power of a data channel based on the power offset and a received power of a pilot channel, and the data channel 39. The method of claim 38, further comprising: determining a power for each channelization code based on a received power and a specified number of channelization codes.   Determining the at least one CQI index includes estimating at least one signal-to-interference and noise ratio (SINR) of the at least one transmission block based on the power per channelization code; and 39. The method of claim 38, comprising determining the at least one CQI index for the at least one transport block based on a SINR.   39. The method of claim 38, further comprising receiving the at least one transmission block transmitted by the Node B at a power for each channelization code. Means for receiving power information from Node B;
Means for determining power per channelization code for a specified number of channelization codes based on the power information;
Means for determining at least one channel quality indicator (CQI) index for at least one transport block based on the power per said channelization code;
Means for transmitting said at least one CQI index to said Node B.   Means for determining the power for each channelization code, means for obtaining a power offset from the power information, for determining the received power of the data channel based on the power offset and the received power of the pilot channel; 43. The apparatus of claim 42, further comprising: means for determining a power for each channelization code based on the received power of the data channel and the specified number of channelization codes.   Means for determining the plurality of CQI indices is means for estimating at least one signal-to-interference and noise ratio (SINR) of the at least one transmission block based on the power per channelization code; 43. The apparatus of claim 42, comprising means for determining the at least one CQI index for the at least one transport block based on the at least one SINR.   43. The apparatus of claim 42, further comprising means for receiving the at least one transmission block transmitted by the Node B at a power greater than or equal to the channelization code.

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